feature 2614: pagination on albums

git-svn-id: http://piwigo.org/svn/trunk@18165 68402e56-0260-453c-a942-63ccdbb3a9ee

include/category_cats.inc.php

@@ -22,11 +22,19 @@
 // +-----------------------------------------------------------------------+
 
 /**
- * This file is included by the main page to show thumbnails for a category
- * that have only subcategories or to show recent categories
+ * This file is included by the main page to show subcategories of a category
+ * or to show recent categories or main page categories list
  *
  */
 
+$selection = array_slice(
+  $page['categories'],
+  $page['starta'],
+  $conf['nb_categories_page']
+  );
+
+$selection = trigger_event('loc_index_categories_selection', $selection);
+
 // $user['forbidden_categories'] including with USER_CACHE_CATEGORIES_TABLE
 $query = '
 SELECT
@@ -38,27 +46,11 @@ SELECT
     count_images,
     count_categories
   FROM '.CATEGORIES_TABLE.' c
-    INNER JOIN '.USER_CACHE_CATEGORIES_TABLE.' ucc ON id = cat_id AND user_id = '.$user['id'];
-
-if ('recent_cats' == $page['section'])
-{
-  $query.= '
-  WHERE date_last >= '.pwg_db_get_recent_period_expression($user['recent_period']);
-}
-else
-{
-  $query.= '
-  WHERE id_uppercat '.(!isset($page['category']) ? 'is NULL' : '= '.$page['category']['id']);
-}
-
-$query.= '
-    '.get_sql_condition_FandF(
-  array(
-    'visible_categories' => 'id',
-    ),
-  'AND'
-  );
-
+    INNER JOIN '.USER_CACHE_CATEGORIES_TABLE.' ucc 
+    ON id = cat_id 
+    AND user_id = '.$user['id'].'
+  WHERE c.id IN('.implode(',', $selection).')';
+  
 if ('recent_cats' != $page['section'])
 {
   $query.= '

include/functions.inc.php

@@ -1429,13 +1429,13 @@ function verify_ephemeral_key($key, $aditionnal_data_to_hash = '')
 /**
  * return an array which will be sent to template to display navigation bar
  */
-function create_navigation_bar($url, $nb_element, $start, $nb_element_page, $clean_url = false)
+function create_navigation_bar($url, $nb_element, $start, $nb_element_page, $clean_url = false, $param_name='start')
 {
   global $conf;
 
   $navbar = array();
   $pages_around = $conf['paginate_pages_around'];
-  $start_str = $clean_url ? '/start-' : (strpos($url, '?')===false ? '?':'&').'start=';
+  $start_str = $clean_url ? '/'.$param_name.'-' : (strpos($url, '?')===false ? '?':'&').$param_name.'=';
 
   if (!isset($start) or !is_numeric($start) or (is_numeric($start) and $start < 0))
   {

include/functions_url.inc.php

@@ -458,6 +458,7 @@ function parse_section_url( $tokens, &$next_token)
             and strpos($tokens[$current_token], 'created-')!==0
             and strpos($tokens[$current_token], 'posted-')!==0
             and strpos($tokens[$next_token], 'start-')!==0
+            and strpos($tokens[$next_token], 'starta-')!==0
             and $tokens[$current_token] != 'flat')
         {
           if (empty($maybe_permalinks))
@@ -651,6 +652,10 @@ function parse_well_known_params_url($tokens, &$i)
     {
       $page['start'] = $matches[1];
     }
+    elseif (preg_match('/^starta-(\d+)/', $tokens[$i], $matches))
+    {
+      $page['starta'] = $matches[1];
+    }
     $i++;
   }
   return $page;

include/section_init.inc.php

@@ -41,7 +41,11 @@
 //   'start'    => 24
 //   );
 
-$page['items'] = array();
+// exemple of dynamic nb_categories_page (%2 for nice display)
+// $conf['nb_categories_page'] = 2*round($user['nb_image_page']/4);
+
+$page['items'] = $page['categories'] = array();
+$page['start'] = $page['starta'] = 0;
 
 // some ISPs set PATH_INFO to empty string or to SCRIPT_FILENAME while in the
 // default apache implementation it is not set
@@ -246,8 +250,11 @@ if ('categories' == $page['section'])
   else
     $page['title'] = ''; // will be set later
 
+    
+  // GET IMAGES LIST
   if
     (
+      $page['starta'] == 0 and
       (!isset($page['chronology_field'])) and
       (
         (isset($page['category'])) or
@@ -310,6 +317,44 @@ SELECT DISTINCT(image_id)
 
     $page['items'] = array_from_query($query, 'image_id');
   } //otherwise the calendar will requery all subitems
+  
+  // GET CATEGORIES LIST
+  if ( 0==$page['start']
+    and !isset($page['flat'])
+    and !isset($page['chronology_field'])
+    and ('recent_cats'==$page['section'] or 'categories'==$page['section'])
+    and (!isset($page['category']['count_categories']) or $page['category']['count_categories']>0 )
+  )
+  {
+    $query = '
+SELECT c.id
+  FROM '.CATEGORIES_TABLE.' c
+    INNER JOIN '.USER_CACHE_CATEGORIES_TABLE.' ucc 
+    ON id = cat_id 
+    AND user_id = '.$user['id'];
+
+    if ('recent_cats' == $page['section'])
+    {
+      $query.= '
+      WHERE date_last >= '.pwg_db_get_recent_period_expression($user['recent_period']);
+    }
+    else
+    {
+      $query.= '
+      WHERE id_uppercat '.(!isset($page['category']) ? 'is NULL' : '= '.$page['category']['id']);
+    }
+
+    $query.= '
+        '.get_sql_condition_FandF(
+          array('visible_categories' => 'id'),
+          'AND'
+          );
+
+    $query.= '
+    ;';
+
+    $page['categories'] = array_from_query($query, 'id');
+  }
 }
 // special sections
 else